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can u please explain about operons??
Operons are a major feature of all prokaryotic genomes, but how and why operon structures vary is not well understood.
In prokaryotic cells (and viruses) the control of gene activity is often in the form of operons.
A.    Operons are a form of transcriptional control.
B.    An operon consists of the structural gene (or genes) which actually code for specific proteins and the controlling elements associated with the control of those genes. An operon typically contains several genes, all under the same control mechanism.
C.    Though rather similar controlling systems have been found for some eukaryotic genes, control mechanisms in eukaryotes are generally more diverse and more complex, and except for a few examples in simple eukaryotic organisms like yeasts, multiple genes are not found to function under a single control mechanism.
  Eukaryotic cells do not have operons.


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